code: def get_all_case_combinations(np):
      """
      Returns all case combinations for the noun-phrase (regular, upper, lower, title)
      Args:
          np (str): a noun-phrase
      Returns:
          list(str): List of all case combinations
      """
      candidates = [np, np.upper(), np.lower(), np.title()]
      return candidates
  
imports: import argparse
  import csv
  import math
  import os
  from multiprocessing import Pool
  import feature_extraction
  import numpy
  from tqdm import tqdm
  from nlp_architect.utils.io import validate_existing_filepath, validate_parent_exists, validate_proxy_path
label_desc: Use image node_id 5 for calling a global function with example usage: get_all_case_combinations(np) and returns: candidates